4. An annular ring of aluminum is cut from an aluminum sheet as shown. When this ring is heated What happens to the aluminum

By what factor does the drag force on a car increase as it goes from 65 to 110 km/h?

Smallest intensity of a stimulus that you can detect 50 percent of the time is

How many excess electrons must be present on each sphere if the magnitude of the force of repulsion between them is 4.57×10−21 newtons?